Yoga mat or foam insulation is what is recommended under a rimless tank.
The idea is that slight imperfections in the stand top could potentially cause stress points on the glass causing it to crack. With the padding it negates any imperfections and allows the entire tank to sit flat with no pressure points.
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80G SCA Build: http://reefcentral.com/forums/showthread.php?t=2560256
Originally posted by der_wille_zur_macht:
"He's just taking his lunch to work"
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